Baseline Exhaust Air Energy Recovery Requirement

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Dear All,

For Appendix G modeling, under G3.1.2.10, there are two exceptions to
the requirements for heat recovery:

d. Heating systems in climate zones 1 through 3.
e. Cooling systems in climate zones 3c, 4c, 5b, 5c, 6b, 7 and 8.

Suppose that the baseline systems is VAV with reheat in climate zone 4C.
In this case, the cooling system shall be exempt. However, the same
system is used for heating and does not comply with (d) above due to the
climate zone. Should one model the baseline case with heat recovery?

Thanks,

Omer Moltay

Omer Moltay's picture
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Yes, but it doesn't need to operate in cooling mode.
Jeremy

___________________________________________
Jeremy McClanathan, P.E., BEMP, HFDP, LEED? AP BD+C

Jeremy McClanathan's picture
Joined: 2011-09-30
Reputation: 200

This brings up another interesting question. If heat recovery does not
operate in one of the modes of the baseline design simulation, is it
assumed that you _do not_ get the additional fan power credit for that
particular mode (i.e. baseline has a bypass around the ERV if there is
no energy recovery occurring).

-David

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